Blowpipe.



ramena/enrich.

ANDR GABRIEL Lr. cna'rnnina, or Maasnngmmrnanon.

nnowrrrn.

speaiscatipn of Letters raient Patented July a', 19.12.

Application filed September 10, 190B. Serial No. 452,492.

To all whom t may concern:

Be it known that I, ANDR GABRIEL Ln CiiA'ruLmR, a citizen of the FrenchRepub- A lic, and resident of Marseille, France, have invented certainnew and useful Blowpipes, of which the following isa specification.

In blow pipes in which oxygen is employed as the burning element it isnecessary particularly in the case of Oxy-acetylene blow pipes tointerpose in the passages through which the gases are conveyed to themixing chamber. a device capable of. checking the explosionithat mayoccur in these passages in consequence ot a defect in the action of theblow pipe and spread toV the generators. With this object it has beenusual to make use of porous bricks, which have the disadvantage of beingsomewhat fragile, or of pipes of a certain length, in which the gasescan remain for a certain time superposed, without mixing.- This lattermethod is not sufficiently eliicacicus and does not atiord the completenecessary Clt guarantee of eiiiciency and safety.

The purpose of this invention is to eliect an arrangement by means ofwhich the eX- plosion is always reliably checked. lt is based on theproperty possessed by narrow passages of retarding and arresting thespreading of the 'explosion of combustible mixtures by reason of thecooling act-ion ot their sides .on the dame. For combustible mixturescontaining oxygen only very narrow or apillary passages with an openingonly a rew tenths of a millimeter in width are capable of checking thecourse of the explosion: `particularly when an Oxy-acetylenic mixture isused, the distance between .the sides of the passage must be less thantwo tenths of a millimeter. ln this arrangement ior arresting explosiondiierent devices may be employed. Thus in the ac.

' companying. drawing provided by way of dillerently proportioned.

example one form of this device is illustrated.

Figure 1 is a central sectional view of one form and embodiment of myinvention; Fig. 2 is an elevation view of alchecking d-l vice removedfrom the mixing chamber; the same being ot similar 'construct-ion to thcchecking device shown in Fig. l, but

Fig. 53 is a sectional View ot the. checking device, taken on.\ne'(l-l), of F2.

The most practical way oi carrying out the invention consists insub-dividing thc .diaphragms'into elements bythe juxtaposition -of-whichowing to the provision of studs or blocks, capillary holes or slots areproduced.

Fig. 2 or'checking device, obtained-by puttingtd. gether annularelements or disks. g' furnished with studs ,or projections h. Any otherproper form of checking device may be' used and after being puttogether, the elements if" of metal can be soldered so as to form asingle block.

The disks may be made of metal or of ceramic or any other suitablematerial.

precise adjustment to be eHected land in .many cases aluminium would besuitableby` reason of Yits lightness. If the checking de.- vicewereplaced at a certain distance from explosibn which begins in thismixingchamber might spread so rapidly that the etlicacy of the checkingdevice would be reduced. It', is therefore advisable that the 'checkingdevice should be placed in proximity to this mixing chamber and thedevice illustrated is particularly suitable for lthis purpose. Fig. 1represents a blow pipe thus arranged. p The combustible gas enters at Zthrough the casing of the cylindrical checking devicev g and afterpassing through the capillary passages f enters the injector mthatenters through the pipe n. The injector m extends vthrough a headm', which gas admitting opening Z.' The casing has an opening at one endto admit the gas supporting combustion. charges into .thcinner end ofthe injector, the said linjector having a longitudinally jeetor m isprovided witha transverse passagem5 which establishes communicationbetween the opening or inlet Z, through the medium ofthe slots f, andbom'fmunicates directly with the nipple or nozzle and with thepassage/m4.

considered in connection' with blow pipes may obviously be employed in'any other arrest. the courseof explosion -ot any eX- plosive gas orgaseous mixture whateverr Having now fully 'described `'my said inillustrates a' cylindrical structure,

The explosion arrestingv device specially .Metal has'the advantage ofenabling a more A where it mixes with the oxygen y head is threaded inacasing m2 having the disposed passage mtfor the.mixed gas and combustionsupporting medium. The

apparatus in which it may benecessary to the mixing chamber of the blowpipe the '-15 'f vention, what l claim andvdesire to'secure by LettersPatent, is

l. The combination ofaJ blow pipe 1njector, a head to which/saidinjector1s applied and through whic'h'it extends, a casing,

to which the head is attached, the said casing having a combustible gassupply opening in the side wall thereof and a combustion supporting gassupply opening in the end theretherebetween in communicatlon with thegas supply opening for the admission of the gas to the transverseopeningv inthe injector, the` said disks 4having central `bores oropening:J the Walls of which surround that portion of the nippleextending within the casing.

2. The combination of a blow pipe in-` jector, a casing into which aportion of the injector extends, the said injector having a transverselydisposed openin Within the casing and a-'longitudinally l(disposedpassage communicating therewith in a portion extending without thecasing,a series of y Witnesses:

disks having apertures the walls of which encircle the injector withinthe casing, the said disks having capillary passages therebetweenextending from the edges to-the interior thereof, means for supplyinggas to thecasing external of the'edges of the disks, and means forsupplying oxygen across the transversely disposed opening into the'longitudinally disposed passage of the .injector.

8. The combination of a blowy pipe injector having threads on an end`portion, acasing through whichthe injector is th'readed, said injectorhaving `a transversely disn posed aperture and a longitudinally disposedpassage in communication, a series of disks in the casing havingapertures through.'

which the injector extends, the said disks having capillary passagestherebetween for the passage of gas from. the edges of said `disks tothe apertures thereof, and a nozzle for supplying oxygen havingitsdischarging orifice at the junction of the transverselydisposed passageof the injector. In testimony whereof l have hereunto set myhandinpresenee of two witnesses.

ANDR, Asaniert te GiiArELIER'.

disposed aperture and the longitudinally JEAN THLACK, Marins Mouans.

Copies of this patent may. be obtainedfqr ve cents each, by addressingthe Commissioner of Patents,

, Washington, D. C,

